/** @file
Simple Text Input Ex protocol from the UEFI 2.0 specification.

This protocol defines an extension to the EFI_SIMPLE_TEXT_INPUT_PROTOCOL
which exposes much more state and modifier information from the input device,
also allows one to register a notification for a particular keystroke.

Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#ifndef __SIMPLE_TEXT_IN_EX_H__
#define __SIMPLE_TEXT_IN_EX_H__

#include <SimpleTextIn.h>

#define EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL_GUID \
  {0xdd9e7534, 0x7762, 0x4698, { 0x8c, 0x14, 0xf5, 0x85, 0x17, 0xa6, 0x25, 0xaa } }


typedef struct _EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL;

/**
The Reset() function resets the input device hardware. As part
of initialization process, the firmware/device will make a quick
but reasonable attempt to verify that the device is functioning.
If the ExtendedVerification flag is TRUE the firmware may take
an extended amount of time to verify the device is operating on
reset. Otherwise the reset operation is to occur as quickly as
possible. The hardware verification process is not defined by
this specification and is left up to the platform firmware or
driver to implement.

@param This                 A pointer to the EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL instance.

@param ExtendedVerification Indicates that the driver may
perform a more exhaustive
verification operation of the
device during reset.


@retval EFI_SUCCESS       The device was reset.

@retval EFI_DEVICE_ERROR  The device is not functioning
correctly and could not be reset.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_INPUT_RESET_EX)(
IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This,
IN BOOLEAN                           ExtendedVerification
);


///
/// EFI_KEY_TOGGLE_STATE. The toggle states are defined.
/// They are: EFI_TOGGLE_STATE_VALID, EFI_SCROLL_LOCK_ACTIVE
/// EFI_NUM_LOCK_ACTIVE, EFI_CAPS_LOCK_ACTIVE
///
typedef UINT8 EFI_KEY_TOGGLE_STATE;

typedef struct _EFI_KEY_STATE {
    ///
    /// Reflects the currently pressed shift
    /// modifiers for the input device. The
    /// returned value is valid only if the high
    /// order bit has been set.
    ///
    UINT32                KeyShiftState;
    ///
    /// Reflects the current internal state of
    /// various toggled attributes. The returned
    /// value is valid only if the high order
    /// bit has been set.
    ///
    EFI_KEY_TOGGLE_STATE  KeyToggleState;
} EFI_KEY_STATE;

typedef struct {
    ///
    /// The EFI scan code and Unicode value returned from the input device.
    ///
    EFI_INPUT_KEY   Key;
    ///
    /// The current state of various toggled attributes as well as input modifier values.
    ///
    EFI_KEY_STATE   KeyState;
} EFI_KEY_DATA;

//
// Any Shift or Toggle State that is valid should have
// high order bit set.
//
// Shift state
//
#define EFI_SHIFT_STATE_VALID     0x80000000
#define EFI_RIGHT_SHIFT_PRESSED   0x00000001
#define EFI_LEFT_SHIFT_PRESSED    0x00000002
#define EFI_RIGHT_CONTROL_PRESSED 0x00000004
#define EFI_LEFT_CONTROL_PRESSED  0x00000008
#define EFI_RIGHT_ALT_PRESSED     0x00000010
#define EFI_LEFT_ALT_PRESSED      0x00000020
#define EFI_RIGHT_LOGO_PRESSED    0x00000040
#define EFI_LEFT_LOGO_PRESSED     0x00000080
#define EFI_MENU_KEY_PRESSED      0x00000100
#define EFI_SYS_REQ_PRESSED       0x00000200

//
// Toggle state
//
#define EFI_TOGGLE_STATE_VALID    0x80
#define EFI_KEY_STATE_EXPOSED     0x40
#define EFI_SCROLL_LOCK_ACTIVE    0x01
#define EFI_NUM_LOCK_ACTIVE       0x02
#define EFI_CAPS_LOCK_ACTIVE      0x04

//
// EFI Scan codes
//
#define SCAN_F11                  0x0015
#define SCAN_F12                  0x0016
#define SCAN_PAUSE                0x0048
#define SCAN_F13                  0x0068
#define SCAN_F14                  0x0069
#define SCAN_F15                  0x006A
#define SCAN_F16                  0x006B
#define SCAN_F17                  0x006C
#define SCAN_F18                  0x006D
#define SCAN_F19                  0x006E
#define SCAN_F20                  0x006F
#define SCAN_F21                  0x0070
#define SCAN_F22                  0x0071
#define SCAN_F23                  0x0072
#define SCAN_F24                  0x0073
#define SCAN_MUTE                 0x007F
#define SCAN_VOLUME_UP            0x0080
#define SCAN_VOLUME_DOWN          0x0081
#define SCAN_BRIGHTNESS_UP        0x0100
#define SCAN_BRIGHTNESS_DOWN      0x0101
#define SCAN_SUSPEND              0x0102
#define SCAN_HIBERNATE            0x0103
#define SCAN_TOGGLE_DISPLAY       0x0104
#define SCAN_RECOVERY             0x0105
#define SCAN_EJECT                0x0106

/**
The function reads the next keystroke from the input device. If
there is no pending keystroke the function returns
EFI_NOT_READY. If there is a pending keystroke, then
KeyData.Key.ScanCode is the EFI scan code defined in Error!
Reference source not found. The KeyData.Key.UnicodeChar is the
actual printable character or is zero if the key does not
represent a printable character (control key, function key,
etc.). The KeyData.KeyState is shift state for the character
reflected in KeyData.Key.UnicodeChar or KeyData.Key.ScanCode .
When interpreting the data from this function, it should be
noted that if a class of printable characters that are
normally adjusted by shift modifiers (e.g. Shift Key + "f"
key) would be presented solely as a KeyData.Key.UnicodeChar
without the associated shift state. So in the previous example
of a Shift Key + "f" key being pressed, the only pertinent
data returned would be KeyData.Key.UnicodeChar with the value
of "F". This of course would not typically be the case for
non-printable characters such as the pressing of the Right
Shift Key + F10 key since the corresponding returned data
would be reflected both in the KeyData.KeyState.KeyShiftState
and KeyData.Key.ScanCode values. UEFI drivers which implement
the EFI_SIMPLE_TEXT_INPUT_EX protocol are required to return
KeyData.Key and KeyData.KeyState values. These drivers must
always return the most current state of
KeyData.KeyState.KeyShiftState and
KeyData.KeyState.KeyToggleState. It should also be noted that
certain input devices may not be able to produce shift or toggle
state information, and in those cases the high order bit in the
respective Toggle and Shift state fields should not be active.


@param This     A pointer to the EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL instance.

@param KeyData  A pointer to a buffer that is filled in with
the keystroke state data for the key that was
pressed.


@retval EFI_SUCCESS     The keystroke information was
returned.

@retval EFI_NOT_READY   There was no keystroke data available.
EFI_DEVICE_ERROR The keystroke
information was not returned due to
hardware errors.


**/
typedef
EFI_STATUS
(EFIAPI *EFI_INPUT_READ_KEY_EX)(
IN  EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This,
OUT EFI_KEY_DATA                      *KeyData
);

/**
The SetState() function allows the input device hardware to
have state settings adjusted.

@param This           A pointer to the EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL instance.

@param KeyToggleState Pointer to the EFI_KEY_TOGGLE_STATE to
set the state for the input device.


@retval EFI_SUCCESS       The device state was set appropriately.

@retval EFI_DEVICE_ERROR  The device is not functioning
correctly and could not have the
setting adjusted.

@retval EFI_UNSUPPORTED   The device does not support the
ability to have its state set.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_SET_STATE)(
IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This,
IN EFI_KEY_TOGGLE_STATE              *KeyToggleState
);

///
/// The function will be called when the key sequence is typed specified by KeyData.
///
typedef
EFI_STATUS
(EFIAPI *EFI_KEY_NOTIFY_FUNCTION)(
IN EFI_KEY_DATA *KeyData
);

/**
The RegisterKeystrokeNotify() function registers a function
which will be called when a specified keystroke will occur.

@param This                     A pointer to the EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL instance.

@param KeyData                  A pointer to a buffer that is filled in with
the keystroke information for the key that was
pressed.

@param KeyNotificationFunction  Points to the function to be
called when the key sequence
is typed specified by KeyData.


@param NotifyHandle             Points to the unique handle assigned to
the registered notification.

@retval EFI_SUCCESS           The device state was set
appropriately.

@retval EFI_OUT_OF_RESOURCES  Unable to allocate necessary
data structures.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_REGISTER_KEYSTROKE_NOTIFY)(
IN  EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This,
IN  EFI_KEY_DATA                      *KeyData,
IN  EFI_KEY_NOTIFY_FUNCTION           KeyNotificationFunction,
OUT EFI_HANDLE                        *NotifyHandle
);

/**
The UnregisterKeystrokeNotify() function removes the
notification which was previously registered.

@param This               A pointer to the EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL instance.

@param NotificationHandle The handle of the notification
function being unregistered.

@retval EFI_SUCCESS The device state was set appropriately.

@retval EFI_INVALID_PARAMETER The NotificationHandle is
invalid.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_UNREGISTER_KEYSTROKE_NOTIFY)(
IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL  *This,
IN EFI_HANDLE                         NotificationHandle
);


///
/// The EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL is used on the ConsoleIn
/// device. It is an extension to the Simple Text Input protocol
/// which allows a variety of extended shift state information to be
/// returned.
///
struct _EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL{
    EFI_INPUT_RESET_EX              Reset;
    EFI_INPUT_READ_KEY_EX           ReadKeyStrokeEx;
    ///
    /// Event to use with WaitForEvent() to wait for a key to be available.
    ///
    EFI_EVENT                       WaitForKeyEx;
    EFI_SET_STATE                   SetState;
    EFI_REGISTER_KEYSTROKE_NOTIFY   RegisterKeyNotify;
    EFI_UNREGISTER_KEYSTROKE_NOTIFY UnregisterKeyNotify;
};


extern EFI_GUID gEfiSimpleTextInputExProtocolGuid;

#endif

